The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2017
Filed:
Jan. 15, 2015
Zhongyuan Cheng, Kitchener, CA;
Bin Wu, Toronto, CA;
Navid R. Zargari, Cambridge, CA;
Kai Tian, Toronto, CA;
David Dewei Xu, Pickering, CA;
Zhongyuan Cheng, Kitchener, CA;
Bin Wu, Toronto, CA;
Navid R. Zargari, Cambridge, CA;
Kai Tian, Toronto, CA;
David Dewei Xu, Pickering, CA;
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
Methods and charging apparatus are presented for charging cell capacitors of a multilevel power conversion system, in which an auxiliary charging source is selectively applied across DC bus terminals while one or more selected multilevel converter cells are alternately switched between a first state to bypass the selected cell or cells and a second state to charge the cell capacitor or capacitors of the selected cell via charging current from the auxiliary charging source.